片段如何實現dialogfragment

Question

我有一個關於dialogfragment的問題-我通過教程創建了一個使用dialogfragment的類，但是在本教程中，單擊按鈕顯示了dialogfragment-我想通過單擊MainActivity中的fragment選項卡顯示dialogfragment ..我有Fragment GetItem方法，其中我的代碼中有空的case 4-這是片段，我想通過單擊它來打開dialogfragment。 有我的密碼。 感謝您提供的所有幫助和答案！ 很抱歉，如果不清楚。

-問題已修復（即注釋）-我創建了新的DialogFragment-xml文件和Java類-來自guides.codepath.com/android/Using-DialogFragment#build-dialo‌g的代碼，然后將此代碼添加至MainActivity

 tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager) {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                super.onTabSelected(tab);
                int position = tab.getPosition();
                if (position == 4) {
                    showAlertDialog();
                }
            }
        });
    }
    private void showAlertDialog() {
        FragmentManager fm = getSupportFragmentManager();
        EditNameDialogFragment alertDialog = EditNameDialogFragment.newInstance("Some title");
        alertDialog.show(fm, "fragment_alert");
    }

Answer 1

您可能想檢測單擊了哪個選項卡，然后像其他任何對話框一樣顯示對話框

您需要添加一個TabLayout.OnTabSelectedListener

設置

tabLayout.setupWithViewPager(mViewPager);
tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager) {
  @Override
  public void onTabSelected(TabLayout.Tab tab) {
      super.onTabSelected(tab);
      int position = tab.getPosition();
      if (position == 4) {
          // Create MediaFragment here
      } 
   }
});

Answer 2

參見android 示例 ：

public static class MyAlertDialogFragment extends DialogFragment {

public static MyAlertDialogFragment newInstance(int title) {
    MyAlertDialogFragment frag = new MyAlertDialogFragment();
    Bundle args = new Bundle();
    args.putInt("title", title);
    frag.setArguments(args);
    return frag;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    int title = getArguments().getInt("title");

    return new AlertDialog.Builder(getActivity())
            .setIcon(R.drawable.alert_dialog_icon)
            .setTitle(title)
            .setPositiveButton(R.string.alert_dialog_ok,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        ((FragmentAlertDialog)getActivity()).doPositiveClick();
                    }
                }
            )
            .setNegativeButton(R.string.alert_dialog_cancel,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        ((FragmentAlertDialog)getActivity()).doNegativeClick();
                    }
                }
            )
            .create();
}

}